From: erg <devnull@localhost>
Date: Thu, 16 Feb 2006 22:54:13 +0000 (+0000)
Subject: Fix bug in previous version: technically, '\0' is a control character
X-Git-Tag: LAST_LIBGRAPH~32^2~6794
X-Git-Url: https://granicus.if.org/sourcecode?a=commitdiff_plain;h=249a839e101d414dba86fa1889cee1a4cb26f158;p=graphviz

Fix bug in previous version: technically, '\0' is a control character
but we can't treat it as white space.
---

diff --git a/lib/graph/lexer.c b/lib/graph/lexer.c
index e9dd6b7a1..aaa56ea4b 100644
--- a/lib/graph/lexer.c
+++ b/lib/graph/lexer.c
@@ -66,7 +66,7 @@ void aglexinit(FILE * fp, gets_f mygets)
     (Lexer_gets) (AG.linebuf, 0, fp);	/* reset mygets */
 }
 
-#define ISSPACE(c) (isspace(c) || iscntrl(c))
+#define ISSPACE(c) ((c != 0) && ((isspace(c) || iscntrl(c))))
 
 /* skip leading white space and comments in a string p
  * whitespace includes control characters